Patent GB-974079-A (GB)
Title: Process for dry cleaning fibrous materials
IPC: D06L1/04
Filed: 1960-12-12
Abstract: A dry cleaning intensifier is formed by self-condensation of one or more ether carboxylic acids, or of one or more salts thereof, of the general formula <FORM:0974079/C3/1> in which Y is hydrogen or a salt-forming cation, n and m are 1, 2, or 3, z has a value from 0 to 3, R1 is an aromatic or cycloaaliphatic hydrocarbon radical, and R is hydrogen, an alkyl, cycloalkyl, an aryl, an alkyl-aryl or an aralkyl radical, the ether carboxylic acid or salt or at least one of the ether carboxylic acids or salts used in the condensation containing at least one alkyl or at least one cycloalkyl radical R containing at least 8 to 30 carbon atoms or by condensation of one mol of at least one compound of the above formula with up to one mol of at least are of the following compounds: urea, a triazine, a urea-formaldehyde precondensation product, a melamine-formaldehyde precondensation product, or an aminocarboxylic acid.  As examples of ether-carboxylic acids are mentioned: 4-dodecyl-2-methylol-phenoxy-acetic acid, sodium salt of 4-nonyl-2 methylol-phenoxy acetic acid, 2-methyl-4-methylol-phenoxypropionic acid, 2:4-methylol-phenoxy acetic acid-2-carboxylic acid, magnesium salt of dinonyl-dimethylol-naphthoxyacetic acid, 2-bornyl-4-methylol-phenoxy acetic acid, 2-cyclohexyl-4:6-dimethylol-phenoxyacetic acid, 2:4-dichloro-6-methylol-phenoxypropionic acid, 2-phenyl-4-methylol-phenoxy-butyric acid, 2-benzyl-4-methylol-phenoxyacetic acid, 4-bornyl-2-methylol-cyclohexyl ether acetic acid, 4-nonyl-4 phenyl-2-methylol-phenoxyacetic acetic acid, the condensation product of 1 mol of nonylphenoxyacetic acid and 1.3 mol of formaldehyde.  As examples of urea-formaldehyde precondensates are mentioned: dimethylol urea, tetramethylol-glyoxal-dicereine and dimethylolethylene urea, and as melamine-formaldehyde precondensates are mentioned trimethylol-triaminotriazine and hexamethylol-triaminotriazine.  The corresponding methyl ethers of the urea or melamine-formaldehyde condensates may also be used. The condensation product must contain at least three molecules of an ether carboxylic acid. Specific examples include the condensation products of 1 mol of sodium salt of nonyl-phenoxyacetic acid and 0.8 mol of dimethylolethylene urea, and of 1 mol of dodecylphenoxyacetic acid and tetramethylol-glyoxaldicereine-tetramethyl ether.  There are also disclosed co-condensates of the acids with formaldehyde with or without urea, a triazine or an amino-carboxylic acid, e.g. those of (a) 3 mols of sodium salt of dodecylphenoxyacetic acid and 1 mol of sodium salt of para-cresolacetic acid and 4 mols of formaldehyde (b) 1 mol of sodium salts of octadecylphenoxypropionic acid and 0.8 mol of urea and 1.4 mol of formaldehyde, (c) 1 mol of dinonylphenoxy-acetic acid and 0.2 mol of amino-acetic acid (d) 1 mol of nonylphenoxy-acetic acid and 0-3 mol of phenoxy-acetic acid-2-carboxylic acid and 1 mol of formaldehyde (e) 2 mols of dodecylphenoxy-acetic acid and 1 mol of urea, 0.4 mol of methylamino acetic acid and 3 mols of formaldehyde (f) 1 mol of octadecylphenoxy-acetic acid and 0.6 mol of melamine and 1 mol of formaldehyde (g) 1 mol of sodium salt of bornylphenoxyacetic acid and 1 mol of formaldehyde.ALSO:Textile materials are dry cleaned with a dry cleaning solvent such as benzine, carbon tetrachloride, methylene chloride, tri- or per-chlorethylene or methyl chloroform in the presence of water and a cleaning intensifier consisting of one or more condensation products formed by self-condensation of one or more other carboxylic acids, or of one or more salts thereof, of the general formula <FORM:0974079/C4-C5/1> in which Y is hydrogen or a salt-forming cation, n and m represent an integer from 1 to 3, z has a value from 0 to 3, R1 represents an aromatic or cycloaliphatic hydrocarbon radical and R is hydrogen, an alkyl, cycloalkyl, aryl, alkyl-aryl or aralkyl radical, the ether carboxylic acid or salt or at least one of the ether carboxylic acids or salts subjected to self-condensation containing at least one alkyl or cycloalkyl radical R of at least 8 to 30 carbon atoms, or by condensation of one mol. of at least one compound of the above formula with up to one mol. of at least one of the following compounds: urea, a triazine, melamine, a urea- or melamine-formaldehyde precondensation product, or an aminocarboxylic acid.  In an example soiled clothing is cleaned with tetrachlorethylene containing the condensation product of 1 mol. of sodium nonylphenoxy acetate and 1.2 mol. of formaldehyde. Methanol, ethanol, propanol, octanol, dodecanol and fatty acid ethanolamides may also be included.